Poison Blade
- "It's another blade design...for delivering poison!"
- ―Leonardo da Vinci
The Poison Blade is a Hidden Blade upgrade, essentially a hollow needle equipped with poison. Whoever you inject with the poison will go berserk, swinging their weapon wildly and attacking all those in range, but not killing them unless they're already low on health or are hit multiple consecutive times. Ezio can recharge this weapon by buying poison from street doctors.
This weapon is one of the best you'll get in the game; this is because you can kill someone without attracting much attention to yourself, and instead making people look at the person going berserk. If the people looking at the person berserking are your targets, you can assassinate them quickly and silently, and they wont notice a thing. Additionally, you can make someone go berserk as a distraction to draw guards away from your target and assassinate him. This is especially helpful during Assassination Contract missions.
Poison vials cost 175 florins each and you can carry up to five vials, but poison pouch upgrades bought from the Tailor raise the amount of vials you can carry at once (by up to 15).